Carrier for



UNITED sTATEs PATENT oEEioE.

ACOB ZOOK, OF I-IARRISBURG, PENNSYLVANIA.

CARRIER FOR LATI-IES.

Specification of Letters Patent No.

To aZZ whomz't may concern Be it known that I, JACOB Zoon, of Harrisburg, inthe county of Dauphin and State of Pennsylvania, have invented a new and Improved Self-Acting Carrier for Lathes; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification, Figure l being a front elevation thereof in the position when its action is reversed and the article loosed from it; Fig. 2, a rear elevation of the same in a similar position, certain portions being broken away to show other parts more distinctly; and Fig. 3, a idia-metrical sect-ion of the same in the line m m, Figs. l, and 2; Fig. 4, a front elevation thereof, showing it in action against an article to be turned; and Fig. 5, a rear elevation of the same in a similar position.

Like letters designate corresponding parts in all the figures.

The nature of my invention consists in producing a self-acting carrier for a lathe, by means of projections attached to the carrier-plate of the mandrel, which operate againstlevers situated and vibrating in an auxiliary plate, or disk, and yielding bar attached thereto, which levers o-perate eccentrics fixed to t-he same vibratory pivots and thereby cause them to press against and confine the article to be turned, with a force produced by, and proportional to that required to turn the article, or cause said eccentrics to sepa-rate from and set free the article, when the motion of the mandrel is reversed, arranged, combined and operating substantially as hereinafter set forth.

A circular carrier-plate D, of suit-able dimensions, is att-ached to the driving shaft C, by means of a hub (Z, whereby it is screwed firmly down upon a shoulder c, on said shaft, as shown in Fig. 3. A concentric auxiliary plate, or disk, A, is secured a short distance in front of said carrier-plate, by rims, or ledges, a, e, which embrace respectively its periphery and hub, at the same time enabling the disk to turn or vibrate freely around it. A nut g, screwed upon the end of the shaft C, secures both plates in their places. A bar B, is situated before the face of the disk A, passing diametrically across its center, and being separated a little distance from it by means of projections Z2, o,

whereby it is attached to said disk; which projections are allowed to move diametri- 10,585, dated February 28, 1854.

cally a little within slots 0, o, in the disk; and this movement is rendered yielding or elast-ic by means of small coiled springs 29, p, or their equivalents, arranged in said slots as represented in Fig. 3, for the purpose hereinafter stated. A cent-ral aperture i", is formed in the bar B, through which passes the article to be turned in order to be pressed against the conical point of the driving shaft C, which determines and fixes its center of revolution. On opposite sides of the aperture 1', the bar is pro-vided with longitudinal slo-ts, it, Zz, within which the pivots of eccentrics F, F, which are shaped substantially as represented in Figs. l, and 4, are secured and made adjustable toward or from the centers of the disks, without preventing their turning or vibrating freely, by means of the collars s, s, and fastening nuts t, t. Said pivots f, f, extend through corresponding slots z', z', in the disk A, into the space between said disk and the carrier-plate D, and terminate in, or have attached to their inner extremities, short vibratory arms m, m, at or nearly at right angles to their axes, as shown 1n Figs. 2, 3, and 5. These arms should be of such a length and arranged in such arelation to the positions of the eccentrics F, F, that while said eccentrics are moving within the proper limits of their action, their vibratory ends shall cross the path of two projections n, oz., which are attached to the carrier-plate D, and made adjustable diametrically by means of fastening nuts y', y', securing them in slots Z, Z, in said carrier-plate. In Figs. 2, and 5, portions of the plate D, are broken away, in order to show the relative positions and actions of the arms m, m, and projections n, n.

The limited elastic longitudinal movement given to the bar B, which bears the eccentrics F, F, is intended to equalize the pressure of the two eccentrics, and obviate the tendency to force the article to be turned sidewise, when its center is not exactly upon the point of the shaft C, or when irregularities on its surface cause the bearing points of the eccentrics to be at unequal distances from the center of revolution; as the eccent-rics are supposed always to be adjusted at equal distances from said center of revolution. The springs p, y), will keep the bar B, in a central position when not forced out of it by the eccentricity or irregularity of the article to be turned as first inserted.

Figs. l, 2, and 3, show the positions of the parts before the article to be turned is inserted, the mandrel being at rest, or reversed in its motion. The article G, (Fig. y#1,) having then been inserted in a proper position between the shaft C, and the puppet at the other end, the driving shaft is caused to revolve in the right direction, which moves the carrier-plate D, and its projections n, fit, in the direction indicated by the arrows in Figs. t, and 5, and consequently causes them to bear against the arms m, lm, and thus press the eccentrics F, F, against said article G, as shown in Fig. Ll, with a force proportional to that given to the mandrel, or rather to the resistance oilered by the article in turning it. `When `the article has been turned, the driving shaft is reversed in motion, which causes said carrier-plate and its projections n, n, to move in the direction indicated by the ari rows in Figs. l, and 2, and thereby move the arms m, m, and eccentrics F, F, in the same direction; which movement separates the latter from the article and sets it free.

Having thus fully described my improved self-acting carrier for lathes, what l claim as new and desire to secure by Letters Patent, is-

1. The combination of the projections ma, on the carrier-plate D, with the vibratory arms m, m, and eccentrics F, F, (attached to the same pivots f, f,) or their equivalents, situated and adjustable in, and combined with the auxiliary disk A, and bar B; arranged and operating substantially in the manner and for the purpose herein set forth.

2. I also claim giving a limited elastic play, longitudinally, to the bar B, in the disk A, by means of the slots 0, o, and springs j), p, or their equivalents, substantially as herein described, in order that the pressure of the eccentrics F, F, against the article to be turned, may be equalized, in case their bearing points should, by the irregularity or eccentricity of the article, be at unequal distances from the center of revolution, which is determined and fixed by the conical point of the driving shaft.

The above specification of my new and improved self-acting carrier for lathes signed by me this twenty seventh day of September 1853.

` JACOB ZOOK. Witnesses J. S. BROWN, GEO. A. C. SMITH. 

